Disable Dokka

[oldergod]

Probably related to Kotlin/dokka#2977

We're getting errors like

* What went wrong:
A problem was found with the configuration of task ':wire-gradle-plugin:dokkaJavadocJar' (type 'JavadocJar').
  - Gradle detected a problem with the following location: '/Users/runner/work/wire/wire/docs/3.x'.
    
    Reason: Task ':wire-gradle-plugin:dokkaJavadocJar' uses this output of task ':wire-compiler:dokkaGfm' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.
    
    Possible solutions:
      1. Declare task ':wire-compiler:dokkaGfm' as an input of ':wire-gradle-plugin:dokkaJavadocJar'.
      2. Declare an explicit dependency on ':wire-compiler:dokkaGfm' from ':wire-gradle-plugin:dokkaJavadocJar' using Task#dependsOn.
      3. Declare an explicit dependency on ':wire-compiler:dokkaGfm' from ':wire-gradle-plugin:dokkaJavadocJar' using Task#mustRunAfter.
    
    For more information, please refer to https://docs.gradle.org/8.2.1/userguide/validation_problems.html#implicit_dependency in the Gradle documentation.

* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org./

* Exception is:
org.gradle.internal.execution.WorkValidationException: A problem was found with the configuration of task ':wire-gradle-plugin:dokkaJavadocJar' (type 'JavadocJar').
  - Gradle detected a problem with the following location: '/Users/runner/work/wire/wire/docs/3.x'.
    
    Reason: Task ':wire-gradle-plugin:dokkaJavadocJar' uses this output of task ':wire-compiler:dokkaGfm' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.
    
    Possible solutions:
      1. Declare task ':wire-compiler:dokkaGfm' as an input of ':wire-gradle-plugin:dokkaJavadocJar'.
      2. Declare an explicit dependency on ':wire-compiler:dokkaGfm' from ':wire-gradle-plugin:dokkaJavadocJar' using Task#dependsOn.
      3. Declare an explicit dependency on ':wire-compiler:dokkaGfm' from ':wire-gradle-plugin:dokkaJavadocJar' using Task#mustRunAfter.
    
    For more information, please refer to https://docs.gradle.org/8.2.1/userguide/validation_problems.html#implicit_dependency in the Gradle documentation.
	at org.gradle.internal.execution.WorkValidationException$BuilderWithSummary.build(WorkValidationException.java:133)

[JakeWharton]

This does not seem related to cinterop which is what the linked issue is for. I don't know how publishing is set up, but this seems like a relatively normal missing task dependency.